What is the total length of a rope (5/10) meters long and a rope (3/10) meters long?
一条长(5/10)米的绳子和一条长(3/10)米的绳子合起来长多少米？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) + (3/10)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>