Calculation: (8.4*2.5+9.7)/(1.05/1.5+8.4/0.28)=how much.
计算：(8.4*2.5+9.7)/(1.05/1.5+8.4/0.28)=多少．
<gadget id="calculator">8.4 * 2.5</gadget>
<output>21</output>

<gadget id="calculator">21 + 9.7</gadget>
<output>30.7</output>

<gadget id="calculator">1.05 / 1.5</gadget>
<output>0.7</output>

<gadget id="calculator">8.4 / 0.28</gadget>
<output>30</output>

<gadget id="calculator">0.7 + 30</gadget>
<output>30.7</output>

<gadget id="calculator">30.7 / 30.7</gadget>
<output>1</output>

<result>1</result>