The Times Equals assignment operator will assign a
new value to the variable in front of it: whatever
the variable's current value is * the value after the
operator.

For example:

int A = 5;                /* A is 5  */

A *= 4;                   /* A = A * 4;  So A is now 20. */

A *= 2;                   /* A = A * 2;  So A is now 40. */