Answer:
534,942
Step-by-step explanation:
Step 1: Multiply
678 * 789
(600 * 700) + (600 * 80) + (600 * 9) + (70 * 700) + (70 * 80) + (70 * 9) + (8 * 700) + (8 * 80) + (8 * 9)
420000 + 48000 + 5400 + 49000 + 5600 + 630 + 5600 + 640 + 72
534,942
Answer: 534,942
