Team A and Team B work together to build a 400-meter-long highway. Team A builds it from east to west in 4 days, and Team B builds it from west to east in 5 days. How many meters do teams A and B build together each day?
甲、乙两队共同修一条长400米的公路，甲队从东往西修4天，乙队从西往东修5天，正好修完，甲队比乙队每天多修10米．甲、乙两队每天共修多少米？
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">400 - 40</gadget>
<output>360</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">360 / 9</gadget>
<output>40</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">80 + 10</gadget>
<output>90</output>

<result>90</result>