Calculate 1.25*3.9*2.1/(3.5*2.5*0.39), what is the result?
计算1.25*3.9*2.1/(3.5*2.5*0.39)，结果是多少．
<gadget id="calculator">3.5 * 2.5 * 0.39</gadget>
<output>3.4125</output>

<gadget id="calculator">2.1 / 3.4125</gadget>
<output>0.615385</output>

<gadget id="calculator">1.25 * 3.9 * 0.615385</gadget>
<output>3.000002</output>

<result>3.000002</result>