Uncle Zhang drove a small car from Hankou to Wuchang to work. He was delayed for 10 minutes due to traffic jams on the way to work one day, so he changed to the subway halfway through the car (the transfer time was not counted), and arrived at the work place just on time. It is known that the driving speed is (2/3) the speed of taking the subway. How long does it usually take Uncle Zhang to drive to work?
张叔叔从汉口到武昌开小车上班，一天上班途中因堵车耽误了10分钟，于是他开车到一半路程时换乘地铁，(换乘时间不计)，恰好按时到达上班地点．已知开车速度是乘地铁速度的(2/3)，请问张叔叔平常开车上班需要多长时间？
<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<result>60</result>