A warehouse is 40 m long, 25 m wide and 10 m high. How many cartons, each 2 $m \times 1.25$ $m \times 1$ m, can be stacked inside it?

Explanation

1. 01

   Along the length: $40 \div 2 = 20$. Along the width: $25 \div 1.25 = 20$. Up the height: $10 \div 1 = 10$.

2. 02

   Cartons = $20 \times 20 \times 10 = 4{,}000$. (The same as 10,000 $m^3 \div 2.5$ m³, since the cartons fit exactly.)