When Xiao Ming was doing calculations, he wrote 5 for the 3 in the ones place of the subtrahend, and 0 for the 6 in the tens place. The difference is 189. What is the correct difference? (writing process)
小明做计算题时，把被减数个位上的3写成了5，十位上的6错写成了0，这样得差是189，正确的差是多少？(写出过程)
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">189 - 2</gadget>
<output>187</output>

<gadget id="calculator">60 - 0</gadget>
<output>60</output>

<gadget id="calculator">187 + 60</gadget>
<output>247</output>

<result>247</result>