volume_mute
Both Factors End in Zeros
publish date: 2026/05/09 07:17:26.523645 UTC
volume_mute
Multiply: \(3{,}100 \times 7{,}000\)
Correct Answer
21,700,000
Explanation
Multiply nonzero parts: \(31 \times 7 = 217\). Count trailing zeros: 3,100 has 2, 7,000 has 3 → total 5 zeros. Attach five 0's: \(3{,}100 \times 7{,}000 = 21{,}700{,}000\).
Reference
Mathematics for college students