can you solve my word problem?

Once lived a boy who loved fanta. One day he found $100,000,000,000,000,000,000,000,000,000,000,000, dollars
and he spent it all on fanta he brought 100,000,000,763 litres and drank 963 litres. How much litres are left?

WORKING OUT ?

763-963=-200

100,000,-200=99,999,800

100,000,763-963=99,999,800

by Jordan