A, B, and C jointly transport a batch of goods, among which the tonnage transported by B is (5/6) the tonnage transported by A, and the tonnage transported by C is 80% of that of B. It is known that A transports 20 more tons than B. Ton, how many tons did A transport? (cannot be solved by equation)
甲、乙、丙三人共同运送一批货物，其中乙运送的吨数是甲运送吨数的(5/6)，丙运送的吨数是乙的80%，已知甲比乙多运送20吨，甲运了多少吨？(不能用方程解)
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">20 / (1/6)</gadget>
<output>120</output>

<result>120</result>