returns either a string repeated X times or the product of two numbers $($the arithmetic operation$).$ Return False if second argument is NOT a number

$>>>$ task$4("$hello$",3)$

'hellohellohello'

$>>>$ task$4(10,3)$

$30$

$>>>$ task$4(\text{'}10\text{'},3)$

$\text{'}101010\text{'}$

$>>>$ task$4(\text{'}10\text{'},\text{'}3\text{'})$

False

$>>>$ task$4(\text{'}$hi$\text{'},\text{'}2\text{'})$

False