On Children's Day, the city's elementary school student representatives used cube plastic building blocks with a side length of 5 decimeters to build a 10-meter-long, 3-meter-wide, and 15-meter-high Chinese Dream Wishing Wall in the center of the square. How many blocks?
六一儿童节，全市小学生代表用棱长5分米的正方体塑料搭积木，在广场中央搭起了一个长10米，宽3米，高15米的中国梦心愿墙，这面境一共用了多少块积木？
<gadget id="calculator">5 * 5 * 5</gadget>
<output>125</output>

<gadget id="calculator">10 / 125</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">10 * 10 * 3 * 10 * 15 * (2/25)</gadget>
<output>3_600</output>

<result>3_600</result>