3.5*23+58/(2/7)+19*(7/2).
3.5*23+58/(2/7)+19*(7/2)．
<gadget id="calculator">3.5 * 23</gadget>
<output>80.5</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">58 / (2/7)</gadget>
<output>203</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">19 * (7/2)</gadget>
<output>133/2 = around 66.5</output>

<gadget id="calculator">80.5 + 203 + (133/2)</gadget>
<output>350</output>

<result>350</result>