JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="stavka" value=10>
<input type="button" value='выиграл' id='AA'/>
<input type="button" value='прогирал' id='BB'/><br>

JavaScript

AA.addEventListener('click',A);
BB.addEventListener('click',B);

var V = 0;

function A()
{
var stavk = parseFloat(stavka.value)
 V++;
 if(V==3)
 {
  V=0;
  stavka.value = 10;
 }
}
function B()
{
 stavka.value = stavka.value*2;
}