Push 10 planks of the same size into a cuboid with a volume of 42 cubic meters. It is known that the length of each plank is 7 meters and the width is 3 meters. How many meters is the thickness of the plank?
用10块规格相同的木板推成一个体积42立方米的长方体．已知每块木板的长7米，宽3米，木板的厚是多少米？
<gadget id="calculator">42 / 7 / 3 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>