There are three kinds of animals participating in the race in the animal world. It is known that the speed ratio of the fox to the rabbit is 2:3. The speed of the rabbit is twice that of the squirrel. The squirrel runs 15 meters less per minute than the fox. How many meters does the squirrel run in one minute?
动物世界举行运动会，有三种动物参加赛跑，已知狐狸与兔子的速度比是2：3，兔子的速度是松鼠的2倍，松鼠每分钟比狐狸少跑15m，松鼠一分钟跑多少米？
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

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

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>