The distance between A and B is 350km. An express train and a slow train depart from the two places at the same time. They meet after 3.5 hours. It is known that the speed of the slow train is (2/3) that of the express train. What is the speed of the express train?
甲乙两地相距350km，一列快车和一列慢车同时从两地相对开出，3.5小时后相遇，已知慢车是快车的速度的(2/3)，快车的速度是多少．
<gadget id="calculator">350 / 3.5</gadget>
<output>100</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">100 / (5/3)</gadget>
<output>60</output>

<result>60</result>