Two boats, A and B, are 210 kilometers apart on the same river. If the two ships are traveling in the same direction, they will meet in 2 hours; if they are traveling in the same direction, then A will catch up with B in 14 hours. What is the speed of ship A?
甲、乙两条船，在同一条河上相距210千米．若两船相向而行，则2小时相遇；若同向而行，则14小时甲赶上乙，则甲船的速度为多少．
<gadget id="calculator">210 / 2</gadget>
<output>105</output>

<gadget id="calculator">210 / 14</gadget>
<output>15</output>

<gadget id="calculator">105 + 15</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<result>60</result>