7.5*23+19*(5/2).
7.5*23+19*(5/2)．
<gadget id="calculator">7.5 * 23</gadget>
<output>172.5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">19 * (5/2)</gadget>
<output>95/2 = around 47.5</output>

<gadget id="calculator">172.5 + (95/2)</gadget>
<output>220</output>

<result>220</result>