7.25-1.4*(15/7).
7.25-1.4*(15/7)．
<gadget id="calculator">15 / 7</gadget>
<output>15/7 = around 2.142857</output>

<gadget id="calculator">1.4 * (15/7)</gadget>
<output>3</output>

<gadget id="calculator">7.25 - 3</gadget>
<output>4.25</output>

<result>4.25</result>