The *= can be used multiply itself. It works with all math operators.
EXAMPLE: x += y is x = x + y
// Setup the variables
x = 5;
y = 7;
z = 21
// If you wrote this out long
// form to make the calculations
// and change the variables to
// reflect, it would look like this:
z = z / 14;
y = y + z;
x = x * y;
// RESULT: 42.5
// x = 42.5
// y = 8.5
// z = 1.5
// Reset the variables
x = 5;
y = 7;
z = 21
// Now a much less verbose
// syntax with the same result
x *= y += z /= 14
// RESULT: 42.5
// x = 42.5
// y = 8.5
// z = 1.5
11 % 4 // Results in a remainder of 3
// 11 /4 = 2, SO 4 * 2 =8, WHICH IS 3 SHORT OF 11
100 % 8 // Results in a remainder of 4
// 100 /8 = 12, SO 8 * 12 = 96, WHICH IS 4 SHORT OF 100
17 % 12 // Results in a remainder of 5
// 17 /12 = 1, SO 12 * 1 = 12, WHICH IS 5 SHORT OF 17
5 % 2 // Results in a remainder of 1, so it is odd
x = 10;
y = x++ // Adds one AFTER expressions are evaluated
a = 10;
b = ++b // Adds one BEFORE expressions are evaluated
