(7/10)+(3/10)-(7/10)+(3/10)=how much
(7/10)+(3/10)-(7/10)+(3/10)=多少
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) - (7/10)</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(7/10) + (-2/5) + (3/10)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>