Calculation: (8.4*0.25+9.7)/(1.05/15+84/2.8)=how much.
计算：(8.4*0.25+9.7)/(1.05/15+84/2.8)=多少．
<gadget id="calculator">8.4 * 0.25</gadget>
<output>2.1</output>

<gadget id="calculator">2.1 + 9.7</gadget>
<output>11.8</output>

<gadget id="calculator">1.05 / 15</gadget>
<output>0.07</output>

<gadget id="calculator">84 / 2.8</gadget>
<output>30</output>

<gadget id="calculator">0.07 + 30</gadget>
<output>30.07</output>

<gadget id="calculator">11.8 / 30.07</gadget>
<output>0.392418</output>

<result>0.392418</result>