Xiaohong miscalculated 45*99 as 45*(100+1). Is the result of his calculation more or less than the correct result? How much (less)?
小红把45*99错算成了45*(100+1)，他算的结果比正确的结果是多了还是少了？多(少)多少？
<gadget id="calculator">100 + 1</gadget>
<output>101</output>

<gadget id="calculator">45 * 101</gadget>
<output>4_545</output>

<gadget id="calculator">45 * 99</gadget>
<output>4_455</output>

<gadget id="calculator">4_545 - 4_455</gadget>
<output>90</output>

<result>90</result>