Both A and B live on the same side of a certain street, and the house numbers on this side are all odd numbers. It is known that A lives in No. 9 and B lives in No. 191. So how many families are there on one side of this street?
甲乙两人都住在某大街的同一侧，这一侧的门牌号码都是奇数，现已知甲住9号，乙住191号．那么这条大街的一侧有多少户人家．
<gadget id="calculator">191 - 9</gadget>
<output>182</output>

<gadget id="calculator">182 / 2</gadget>
<output>91</output>

<gadget id="calculator">91 + 1</gadget>
<output>92</output>

<result>92</result>