Xiaohong’s house is 300 meters east of Xiaoxin’s house. Xiaoxin wants to go to Xiaohong’s house. He first walks 40 meters west and then 60 meters east. How many meters does he need to walk to Xiaohong’s house?
小红家在小新家的东面，相距300米，小新要去小红家，先向西走了40米，又向东走了60米，还需要走多少米才到小红家？
<gadget id="calculator">300 - 60</gadget>
<output>240</output>

<result>240</result>