There are 180 three-bedroom apartments for teachers, the number of two-bedroom units is three-bedroom units (2/3), and the number of one-bedroom units is two-bedroom units (1/8). How many apartments are there in a teacher's apartment?
教师公寓有三居室180套，二居室的套数是三居室的(2/3)，一居室的套数是二居室的(1/8)．教师公寓有一居室多少套？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">180 * (2/3) * (1/8)</gadget>
<output>15</output>

<result>15</result>