Calculation: 13.5/(1.5*(1.07+1.93))-2.
计算：13.5/(1.5*(1.07+1.93))-2．
<gadget id="calculator">1.07 + 1.93</gadget>
<output>3</output>

<gadget id="calculator">1.5 * 3</gadget>
<output>4.5</output>

<gadget id="calculator">13.5 / 4.5</gadget>
<output>3</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<result>1</result>