Answer:
32000
Explanation:
To estimate so each only has one nonzero digit, 446 is closer to 400 than 500 so it would be 400. 79 is closer to 80 than 70 so that would be estimated to 80. Therefore 400*80 would be 32000
Although not very accurate, this is what the question asks for. For future reference it would be better to estimate to 450*80