水果店运来苹果0.1 t，运来香蕉0.09375 t。2/5 = 0.4 = 40% ； 3/8 = 0.375 = 37.5%0.25 * 40% = 0.1（t)0.25 *37.5% = 0.09375 （t）
苹果2/5=0.4，0.25*0.4=0.1吨。香蕉 0.25*3/8=0.25*0.375 =0.09375吨
