Write the number 9 to the left of a three-digit number, and add 945 to the new four-digit number. At this time, their sum is exactly 66 times the three-digit number. What is the three-digit number?
把数字9写到一个三位数的左边，再给这个新的四位数加上945，这时它们的和正好是这个三位数的66倍，这个三位数是多少．
<gadget id="calculator">9_000 + 945</gadget>
<output>9_945</output>

<gadget id="calculator">66 - 1</gadget>
<output>65</output>

<gadget id="calculator">9_945 / 65</gadget>
<output>153</output>

<result>153</result>