Calculation: 1.3*0.5-(1/2)*25%-0.25*0.2.
计算：1.3*0.5-(1/2)*25%-0.25*0.2．
<gadget id="calculator">1.3 * 0.5</gadget>
<output>0.65</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) * (1/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">0.25 * 0.2</gadget>
<output>0.05</output>

<gadget id="calculator">0.65 - (1/8) - 0.05</gadget>
<output>0.475</output>

<result>0.475</result>