In the 29th Beijing Olympic Games, the Chinese sports delegation achieved a total of 100 medals, and the number of gold medals ranked first in the Olympic Games for the first time. Among them, silver medals accounted for 21% of the total, and bronze medals accounted for 7/25 of the total. How many gold medals did China get?
在29届北京奥运会上，中国体育代表团取得奖牌总数100枚的优异成绩，且金牌枚数首次名列奥运会榜首．其中银牌占总数的21%，铜牌占总数的(7/25)，中国取得金牌多少枚？
<gadget id="calculator">21 / 100</gadget>
<output>21/100 = around 0.21</output>

<gadget id="calculator">7 / 25</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">1 - (21/100) - (7/25)</gadget>
<output>51/100 = around 0.51</output>

<gadget id="calculator">100 * (51/100)</gadget>
<output>51</output>

<result>51</result>