高时大展宏图G bian0725
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如何把2个field输入的值相乘并输出给一个label ile:///Users/gistadmin/Desktop/Assignment%202%20«%20CMSC%20491%20Fall%20’09%20—%20iPhone%20and%20iPod%20touch%20Development_2.webarchive，求教这题如何做
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