A road is 420m long. Two construction teams, A and B, paved asphalt from both ends of the road to the middle at the same time, and the paving was just finished in 3 days. It is known that the construction speed ratio of Team A and Team B is 4:3, so how many meters of asphalt is laid by Team A every day?
一条公路长420m，甲乙两支施工队同时从公路的两端往中间铺柏油，3天刚好铺完．已知甲队和乙队施工速度的比是4：3，那么甲队每天铺柏油多少米？
<gadget id="calculator">420 / 3</gadget>
<output>140</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">140 * (4/7)</gadget>
<output>80</output>

<result>80</result>