Update README

1 files changed, 9 insertions, 2 deletions

diff --git a/README.md b/README.md
index 692b9a2..326a826 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,8 @@ The parser recognizes the following grammar:
           | Die ' / ' Die
           | Die '+' Die
           | Die '-' Die
+          | Die '*' Die
+          | Die '/' Die
           | '-' Die
           | Die 'E' Die
           | Die 'e' Die
@@ -116,6 +118,10 @@ Semantics are defined in terms of the `pool` function.
 * `D+E` is the additive bonus operation. For each die in `D`'s pool, the die is
   rolled and `roll(E)` is added to its result.
 * `D-E` is equivalent to `D+(-E)`.
+* `D*E` is like `D+E` but multiplies each die in `D`'s pool the result of
+  rolling `E`.
+* `D/E` is like `D+E` but performs integer division on each die in `D`'s pool
+  by the result of rolling `E`.
 * `DEF` (here `E` is the literal symbol `E`, `D` and `F` are dice expressions)
   is an "exploding die." First `D` is rolled.  Now each die in the dice pool
   generated by `F` is rolled repeatedly until it rolls something less than the
@@ -153,8 +159,9 @@ Additionally:
   associative.
 * The binary arithmetic operations bind as expected (multiplication and division
   bind stronger than addition and subtraction).
-* The bonus operations (`+`, `-`) are left associative. They bind stronger than
-  arithmetic operations.
+* The bonus operations (`+`, `-`, `*`, `/`) are left associative. They bind
+  stronger than arithmetic operations. `/` and `*` bind stronger than `+` and
+  `-`.
 * The die operations (`d`, `E`, `K`, etc.) are right associative (`1d2d3` is
   equivalent to `1d(2d3)`, use explicit parentheses if you need `(1d2)d3`).
 * Die operations bind stronger than the binary arithmetic operations