6*(1/4)-13/4+12*0.75.
6*(1/4)-13/4+12*0.75．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 * (1/4)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">13 * (1/4)</gadget>
<output>13/4 = around 3.25</output>

<gadget id="calculator">(3/2) - (13/4)</gadget>
<output>-7/4 = around -1.75</output>

<gadget id="calculator">12 * 0.75</gadget>
<output>9</output>

<gadget id="calculator">(-7/4) + 9</gadget>
<output>29/4 = around 7.25</output>

<result>29/4 = around 7.25</result>