Double summation

Write two nested for loops to calculate the following double summation:

${\displaystyle \underset{i=1}{\overset{s}{}}}{\displaystyle \underset{j=1}{\overset{\text{'}}{}}}ij$

Ex: If $s$ is $3$ and $t$ is $2,$ then summationResult is $18.$

$(11)+(12)+(21)+(22)+(31)+(32)=18$

Function $0$

function summationResult $=$Doubl$\frac{e}{S}um(s,t)$

$\%s$ : First summation limit $(i=1$ to $s$

$\%t$ : Second summation limit to $t$

summationResult $=0$;

$\%$ Write two nested for loops to calculate the double summation

$\%$ summationResult $=$ summationResult $+(i**j)$;