What is the weight of 70kg body on the surface of planet whose mass is 1/7 that of the earth and radius is half of the earth

mp=me/7
rp= re/2
g' = Gmp/r2
   = 4Gm​e/7re2
    = 4ge/7
wp =70*4/7 = 40 kgf
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40kgf
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???????
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nnmm
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mp=me/7
rp= re/2
g' = Gmp/r2
? ?= 4Gm?e/7re2
? ? = 4ge/7
wp?=70*4/7 = 40 kgf
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It's answer is 140 kgf . How ?
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