In the following example, we see the field product.price.value with the value 66. This value must be rounded to a maximum of 2 decimal places, so 66 and 66.00 are both valid rounding examples.

uv.emit('ecProduct', {
  eventType: 'listing',
  product: {
    sku: 'sso-154',
    productId: '120039504',
    name: 'Blue sweater',
    price: {
      currency: 'GBP',
      value: 66
    }
  }
})

Please refer to the following examples.

price: {
  value: 55,
  currency: "USD"
}
price: {
  value: 55.55,
  currency: "USD"
}

Too many numbers after .:

price: {
  value: 55.555,
  currency: "USD"
}