Water professional households plant apple trees in a land with a length of 8 meters and a width of 60 meters. How many apple trees are planted in this area according to the distance between plants of 4 meters and row distance of 7 meters?
水专业户长8米宽60米的形地里种苹树，按照株距4米，行距7米这块共种苹果树少棵？
<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<gadget id="calculator">60 / 28</gadget>
<output>15/7 = around 2.142857</output>

<gadget id="calculator">98 * (15/7)</gadget>
<output>210</output>

<result>210</result>