Uncle Zhang drove from Nanjing to Shanghai on the expressway. When driving 98.5 kilometers, he was still 38.5 kilometers away from the midpoint. How many kilometers was Uncle Zhang still away from Shanghai at this time?
张叔叔驾车从南京上高速去上海，行98.5千米时距中点还有38.5千米，这时张叔叔离上海还有多少千米？
<gadget id="calculator">98.5 + 38.5</gadget>
<output>137</output>

<gadget id="calculator">137 * 2</gadget>
<output>274</output>

<gadget id="calculator">274 - 98.5</gadget>
<output>175.5</output>

<result>175.5</result>