A large storage tank stores gasoline, and (3/8) of it is used up, which is exactly 45 tons. How many tons of gasoline are left in this tank?
一个大型储存罐储存汽油，用去了它的(3/8)，正好是45吨，这罐汽油还剩多少吨？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">45 / (3/8)</gadget>
<output>120</output>

<gadget id="calculator">120 - 45</gadget>
<output>75</output>

<result>75</result>