Three children are running a race. It is known that Xiaohong’s speed is Xiaoqiang’s (3/4), and Xiaoqiang’s speed is 3 times that of Xiaohua. In one minute, Xiaohua runs 15 meters less than Xiaohong. How many meters did you run?
三个小朋友赛跑，已知小红的速度是小强的(3/4)，小强的速度是小华的3倍，一分钟小华比小红少跑15米，那么一分钟小强比小红多跑多少米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/4) - (1/3)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">15 / (5/12)</gadget>
<output>36</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">36 * (1/4)</gadget>
<output>9</output>

<result>9</result>