The ticket sales for various competitions of the 2008 Olympic Games are in full swing. The lowest ticket price for a handball match is 30 yuan, and the lowest ticket price for a swimming match is 20 yuan less than four times that of a handball match. How much more expensive than a handball match?
2008年奥运会各项比赛门票销售正在火热进行中，一场手球比赛的最低票价为30元，一场游泳比赛的最低票价比手球比赛的4倍少20元，一场游泳比赛的最低票价比手球比赛贵多少元？
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<gadget id="calculator">120 - 20 - 30</gadget>
<output>70</output>

<result>70</result>