25% of a pile of chemical fertilizer has been transported away, and exactly 75 tons have been transported. How many tons of this pile of chemical fertilizer are left?
有一堆化肥已运走25%，正好运走75吨，这堆化肥还剩下多少吨？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">75 / (1/4)</gadget>
<output>300</output>

<gadget id="calculator">300 - 75</gadget>
<output>225</output>

<result>225</result>