After a number is enlarged to 100 times, it is 321.75 more than the original number. What is the original number?
一个数扩大到它的100倍后比原数多321.75，原数是多少？
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">321.75 / 99</gadget>
<output>3.25</output>

<result>3.25</result>