The weight of one box = 4 kg 500 g
= 4 x 1000 g + 500 g
= 4500 g
Maximum load can be loaded in van= 800 kg
= 800 x 1000 g
= 800000 g
Number of boxes = 800000 ÷ 4500
__________
4500 \(\bigg)\)800000
- 4500
35000
- 31500
35000
- 31500
3500
Therefore, 177 boxes can be loaded.