There is a piece of cloth, (2/5) meters are used for the first time, 0.55 meters are used for the second time, and (7/10) meters are used for the third time. How many meters did it take three times?
有一块布料，第一次用去(2/5)米，第二次用去0.55米，第三次用去(7/10)米．三次一共用去多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(2/5) + 0.55 + (7/10)</gadget>
<output>1.65</output>

<result>1.65</result>