Simple operation: 5.2*(1/4)+25%+1.8*0.25.
简便运算：5.2*(1/4)+25%+1.8*0.25．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5.2 * (1/4)</gadget>
<output>1.3</output>

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

<gadget id="calculator">1.8 * 0.25</gadget>
<output>0.45</output>

<gadget id="calculator">1.3 + (1/4) + 0.45</gadget>
<output>2</output>

<result>2</result>