3-Digit by Big-Number Multiplication ChallengeOnline version 3-digit by 3+-digit multiplication. by Arnab Biswas 1 What is 123 × 4567? a 561741 b 562110 c 56088 d 560880 2 Compute 456 × 7890. a 3556800 b 359784 c 3648000 d 3597840 3 What is 987 × 1234? a 1217958 b 1221660 c 1216000 d 1209320 4 Find 320 × 7456. a 2368000 b 2385920 c 2400000 d 238400 5 Compute 512 × 12345. a 6172500 b 6320640 c 6320000 d 7407000 6 What is 999 × 1234? a 1230000 b 1232766 c 1232000 d 1234000 7 Calculate 405 × 6789. a 4073400 b 2720000 c 2749545 d 2715600 8 What is 301 × 9001? a 2408000 b 2709000 c 2712010 d 2709301 9 Compute 123 × 4000. a 615000 b 479700 c 504300 d 492000 10 What is 256 × 789? a 201984 b 197250 c 205140 d 202773