Cut a piece of rectangular iron sheet 42 cm wide and 90 cm long into small square iron sheets with side length equal to the number of whole centimeters and equal area (no surplus), at least how many pieces of iron sheet can be cut into?
把一块42厘米宽，90厘米长的长方形铁片，剪成边长为整厘米数，且面积相等的小正方形铁片(不能有剩余)，至少可以剪成多少块铁皮？
<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">15 * 7</gadget>
<output>105</output>

<result>105</result>