Answer:
28980
Explanation:
420 is equal to 42 times 10, 420 = 42 * 10
Instead of 69 * 420, you can write 69 * 42 * 10
69 * 42 is 2898, now multiply the product by 10 (move the decimal place one place to the right)
2898.00 * 10 = 28980.0 = 28980
Hope this helps :)
Have a great day!