Multiply by 5
1234 *5 =6170
Step 1 : Divide the number by 2 :1234/2=617
Step 2: Multiply the result from Step 1 by 10 : 617*10=6170
Multiply by 25
18*25=450
Step 1: Divide the number by 4:18/4
Step 2: Multiply the number from Step 1 by 100: 4.5 * 100 = 450
Multiply by 9
56*9=504
Step 1: Multiply the number by 10: 56*10=560
Step 2: Subtract the original number from Step 1: 560-56=504