It is known that a:b=4, if a becomes a*4 and b becomes b/4, what is the ratio?
已知a：b=4，若将a变为a*4，b变为b/4，则比值变为多少．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">4 * 16</gadget>
<output>64</output>

<result>64</result>