The product of two factors is 72. If one factor remains unchanged and the other factor is expanded by 2 bits, what is the product.
两个因数的积是72，如果一个因数不变，另一个因数扩大2位，积是多少．
<gadget id="calculator">72 * 2</gadget>
<output>144</output>

<result>144</result>