Line segment AB is 150mm long. After Xiao Jun divides it into 10 parts, Xiao Lin divides it into 15 parts on average. How many points are there on line segment AB (not including points A and B).
线段AB长150毫米，小军把它平均分成10份后，小林再把它平均分成15份，这时线段AB上共有多少个分点(不包括A、B两点)．
<gadget id="calculator">150 / 10</gadget>
<output>15</output>

<gadget id="calculator">150 / 15</gadget>
<output>10</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">14 - 4</gadget>
<output>10</output>

<gadget id="calculator">9 + 10</gadget>
<output>19</output>

<result>19</result>