The answer is 1040
Step-by-step explanation
Given the operation 20 * 52
Line up the numbers
20
x 52
Multiply the top number by the bottom number one digit at a time starting with the ones digit (from right to left)
Multiply the top number by the bolded digit of the bottom number
20
x 52
Multiply the bold numbers: 0*2 = 0
20
x 52
______
0
Multiply the bold numbers: 2*2=4
2 0
x 5 2
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4 0
Multiply the top number by the bolded digit of the bottom number
2 0
x 5 2
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