There are two piles of coal, the first pile is 25.5 tons, and the second pile is 1.5 tons less than twice the first pile. How many tons do these two piles of coal weigh together?
有两堆煤，第一堆25.5吨，第二堆比第一堆的2倍少1.5吨．这两堆煤一共重多少吨？
<gadget id="calculator">25.5 * 2</gadget>
<output>51</output>

<gadget id="calculator">51 - 1.5</gadget>
<output>49.5</output>

<gadget id="calculator">25.5 + 49.5</gadget>
<output>75</output>

<result>75</result>