After a piece of cuboid wood with a length of 7dm, a width of 5dm and a thickness of 3dm is sawed into a largest cube, what is the volume of the remaining wood?
把一块长7dm，宽5dm，厚3dm的长方体木料，锯成一个最大的正方体后，剩下的木料的体积是多少？
<gadget id="calculator">7 * 5 * 3</gadget>
<output>105</output>

<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">105 - 27</gadget>
<output>78</output>

<result>78</result>