Simple calculation: 7.7*(1/5)+0.43*2.
简算：7.7*(1/5)+0.43*2．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">7.7 * (1/5)</gadget>
<output>1.54</output>

<gadget id="calculator">0.43 * 2</gadget>
<output>0.86</output>

<gadget id="calculator">1.54 + 0.86</gadget>
<output>2.4</output>

<result>2.4</result>