When Sheng Wei calculated (6+△)*3, he mistook the formula as (6+△)*8, so the result he calculated was 45 more than the correct result. What is △ equal to?
盛伟在计算(6+△)*3时，误将算式看成(6+△)*8，这样他算出的结果比正确的结果多45，△等于多少？
<gadget id="calculator">45 / 5</gadget>
<output>9</output>

<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<result>3</result>