A cuboid cardboard box with a length of 10 cm, a width of 6 cm and a height of 5 cm, with 210 sheets of cardboard of 2 square meters, how many such cardboard boxes can be made? (excluding interface)
一种长方体硬纸盒，长10厘米，宽6厘米，高5厘米，有2平方米的硬纸板210张，可以做这样的硬纸盒多少个？(不计接口)
<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">60 + 30 + 50</gadget>
<output>140</output>

<gadget id="calculator">140 * 2</gadget>
<output>280</output>

<gadget id="calculator">210 / 280</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">20_000 * (3/4)</gadget>
<output>15_000</output>

<result>15_000</result>