李叔叔家有56棵苹果树，今年平均每棵苹果树收苹果137,2千克，李叔叔家今年一共收苹果多少千克？2R4T'F0D5^0s9S)o2?*F.S
算式：提示-|4q/c2B(S/`8i.S2Q8\*N:Q2R4T'F0D5^0s9S)o2?*F.S
答：今年一共收苹果7^(l4^'k5@)l'^千克。2R4T'F0D5^0s9S)o2?*F.S