If $77$ rupees $77$ paise expressed as rupees using decimal is $₹\mathrm{P}$, then find the value of $\mathrm{P}$.

If $200 \mathrm{g}$ is expressed in $\mathrm{kg}$ as $x \mathrm{kg}$, then find the value of $x$.

If $3470 \mathrm{g}$ expressed as $\mathrm{kg}$ is $x \mathrm{kg}$, then find the value of $x$.

If $4 \mathrm{kg} 8 \mathrm{g}$ expressed in $\mathrm{kg}$ as $x \mathrm{kg}$, then find the value of $x$.

Express in kg:
$2598 \mathrm{mg}$