The price of a basketball is 120 yuan, the price of a volleyball is that of a basketball (4/5), and the price of a football is that of a volleyball (7/8). How much is a football?
一个篮球的价钱120元，一个排球的价钱是篮球价钱的(4/5)，一个足球的价钱是排球的(7/8)．一个足球多少钱？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">120 * (4/5) * (7/8)</gadget>
<output>84</output>

<result>84</result>