52.4-4.8/0.8*4.
52.4-4.8/0.8*4．
<gadget id="calculator">4.8 / 0.8</gadget>
<output>6</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">52.4 - 24</gadget>
<output>28.4</output>

<result>28.4</result>