Calculation: (70/4+90/4)/4=how much.
计算：(70/4+90/4)/4=多少．
<gadget id="calculator">70 / 4</gadget>
<output>35/2 = around 17.5</output>

<gadget id="calculator">90 / 4</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">(35/2) + (45/2)</gadget>
<output>40</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<result>10</result>