400000000:1/2:1/5:1/4
400000000 ÷
400000000 × = 800000000 ÷
800000000 × = 400000000 ÷
400000000 ×
= 16,000,000,000
400000000:1/2:1/5:1/4
400000000 ÷
400000000 × = 800000000 ÷
800000000 × = 400000000 ÷
400000000 ×
= 16,000,000,000