The garment factory produced 24,500 sets of children's clothing in the first half of the year, and 4,560 sets of children's clothing in the second half of the year were twice as many as in the first half of the year. How many sets of children's clothing are produced in a year? (List the formula first, then use the calculator to calculate)
服装厂上半年生产童装24500套，下半年生产的童装比上半年的2倍少4560套．全年生产童装多少套？(先列出式子，再用计算器计算)
<gadget id="calculator">24_500 * 2</gadget>
<output>49_000</output>

<gadget id="calculator">49_000 - 4_560</gadget>
<output>44_440</output>

<gadget id="calculator">44_440 + 24_500</gadget>
<output>68_940</output>

<result>68_940</result>