Question 293076
Given
1 Onion = 145 g   
4.20 lb 
1 lb = 453.6 g    conversion factor

so convert 4.20 lb into grams
then grams into onions

4.20 lb * (453.6 g /1 lb) * (1 onion/145 g)=

1905.12/145 =
13.1388 ~ 13.1 three significant digits