multiply by -1...
Divide by 9
multiply by 1/38
The reverse, in the sense of undoing the effects of "divide by 21" is "multiply by 21".
divide by 21
21978
multiply by -1...
Divide by 9
Multiply by 36
multiply by 1/38
The reverse, in the sense of undoing the effects of "divide by 21" is "multiply by 21".
divide by 21
- * - = + - * + = - + * + = + - / - = + - / + = - + / + = + *= multiply /=divide
Divide by 622.
1200. Reverse the operation: reverse of divide is multiply, thus 60 x 20 = 1200
Divide by 4.
Always.