40÷(59? 77+8)
=40÷(59? 7 15)
=40÷445
=450 (tons);
The raw grain storage capacity of warehouse A is:
450×59=250 (ton),
The raw grain storage capacity of warehouse B is:
450-250=200 (ton).
A: Warehouse A originally stored 250 tons of grain, and warehouse B originally stored 200 tons of grain.