The warehouse originally had 128.5 tons of goods, but after some of them were shipped out, 97.8 tons were brought in. At this time, there were 187.6 tons of goods in the warehouse. How many tons were transported away?
仓库原有货物128.5吨，运出一部分后，又运进97.8吨，这时仓库内有货物187.6吨，运走货物多少吨？
<gadget id="calculator">187.6 - 97.8</gadget>
<output>89.8</output>

<gadget id="calculator">128.5 - 89.8</gadget>
<output>38.7</output>

<result>38.7</result>