Omit the mantissa after ten thousand digits and write a rough figure. 84380 ≈ (8)164599 ≈ (6)10000, the same below. 60,8320 6 7,5600 88 ,7890 9 12,0500 1260,3000 60208,4980 2 1 19,9000 2060,4200 190,320027, 603063,720027,603063, 720027,3060405,49008050, 100080 10,5000260,4000785,5000604,600845,39702,70 1025,890043,62509008,80002705,200064, 5890960,408059, 7050960,408059,7050 102,6530 12,34567089200 100060030003000