3(x-5)=7．
3(x-5)=7．
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 + 7</gadget>
<output>22</output>

<gadget id="calculator">22 / 3</gadget>
<output>22/3 = around 7.333333</output>

<result>22/3 = around 7.333333</result>