Update cheatsheet.fr.md

12.temporary_ins/80.energie-transformations-applications-impacts/20.n2/50.energy-mix/40.TD-hydroelectricity/50.parallel-1/cheatsheet.fr.md

@@ -205,7 +205,9 @@ $`\hspace{1,6cm}=\dfrac{1}{300\times 10^6\;(W)}\cdot\dfrac{240\times 10^9\;(W.h)
 * **$`\mathbf{d_{\,stock}^{\,surf}=\dfrac{E_{s\,stock}^{max}}{A_{stock}}}
 =\dfrac{\eta_{\,conv}^{\,destock}\times E_{\,stock}^{\,grav}}{A_{lac}}`$**
 
-$`\hspace{1,6cm}=\dfrac{0,8\times 375\times 10^{9}}{18\times 10^6}`$ **$`\mathbf{\simeq 16,7\;kWh.m^{-2}}`$
+$`\hspace{1,6cm}=\dfrac{0,8\times 375\times 10^{9}}{18\times 10^6}`$ 
+
+**$`\hspace{1,6cm}=\mathbf{\simeq 16,7\;kWh.m^{-2}}`$**
 
 </details>