piece of sand in Shengli Village is rectangular, 500 meters long and 300 meters wide. Plant trees on this sandy land this year, and plant 1 tree every 4 square meters. How many trees can be planted in this piece of sand?
胜利村的一块沙地是长方形的，长500米，宽300米．今年在这块沙地上植树，每4平方米的范围种1棵树．这块沙地共可以植树多少棵？
<gadget id="calculator">300 / 4</gadget>
<output>75</output>

<gadget id="calculator">500 * 75</gadget>
<output>37_500</output>

<result>37_500</result>